How I learned to stop worrying and wrote my own memory-cache
Here I am, writing about performance optimization again. I'm a performance junkie. Constantly monitoring and investigating bottlenecks for our SaaS helpdesk webapp is my favorite thing ever. And I'm proud to say that with thousands of clients, even some really big ones, our app's backend process rarely goes higher than 5-6% CPU. Even during the peak load times which happen around 2-3pm UTC - the time when "Americas are waking up while Europe is still very active".
Reasons NOT to upgrade ASP.NET to ASP.NET Core (but you will have to anyway)
I know, I know, .NET Core is the future of .NET, and "cross-platform blah-blah", and "high-performance and scalable blah-blah", and also "microservices!!! containers!!!" etc. Even more - I understand that's it's inevitable. But still. Consider this an angry post on what's wrong with upgrading from ASP.NET Framework to ASP.NET Core: